Bladeless fan

Abstract

The utility model relates to the technical field of bladeless fans, and provides a bladeless fan which comprises a shell, fan blades and a silencing assembly. The shell is provided with an air duct cavity, the fan blades are rotatably arranged in the air duct cavity, the silencing assembly is located in the air duct cavity, and part of the silencing assembly and the fan blades are oppositely arranged in the axial direction of the fan blades. The bladeless fan provided by the utility model can solve the problem of loud noise of the bladeless fan.

Description

[0001] This application claims priority to a Chinese patent application No.

[0002] 202423093078.0, filed on December 14, 2024, with the Chinese Patent Office, and entitled "A Bladeless Fan", the content of which is incorporated herein by reference in its entirety;

[0003] This application claims priority to a Chinese patent application No.

[0004] This application claims priority to a Chinese patent application No. TECHNICAL FIELD

[0005] The present application relates to the technical field of bladeless fan, in particular to a bladeless fan. BACKGROUND

[0006] As a new type of air circulation equipment, the bladeless fan mainly includes an impeller and a flow guide device, the impeller is arranged in the flow guide device, and air is accelerated by the impeller and the flow guide device and then sprayed out of the air outlet of the flow guide device to form a stable air flow.

[0007] When the air passes through the high-speed rotating impeller inside the bladeless fan, vortex and air flow friction will be generated inside the flow guide device, resulting in noise of the bladeless fan, and mechanical noise will also be generated by the motor of the bladeless fan during operation.

[0008] In the related art, the bladeless fan has the problem of high noise. UTILITARY NEW TYPE

[0009] The present application provides a bladeless fan, which can solve the problem of high noise of the bladeless fan.

[0010] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0011] The present application provides a bladeless fan, comprising:

[0012] A shell having an air duct cavity;

[0013] A fan blade rotatably arranged in the air duct cavity;

[0014] A sound attenuation assembly located in the air duct cavity, part of the sound attenuation assembly being arranged opposite to the fan blade along the axial direction of the fan blade.

[0015] In some embodiments, the shell further has an air inlet communicating with the air duct cavity;

[0016] The sound-absorbing assembly is located on the side of the fan blade close to the air inlet;

[0017] And / or, the sound-absorbing assembly is located on the side of the fan blade away from the air inlet.

[0018] In some embodiments, the sound-absorbing assembly comprises:

[0019] The first sound-absorbing piece is arranged on the inner wall of the shell, and a plurality of sound-absorbing holes are arranged on the first sound-absorbing piece, and the first hole of the sound-absorbing hole faces the air duct cavity.

[0020] In some embodiments, the sound-absorbing assembly further comprises: a second sound-absorbing piece, the second sound-absorbing piece is configured as a sound-absorbing material.

[0021] In some embodiments, the second sound-absorbing piece is arranged in the sound-absorbing hole;

[0022] And / or, the second sound-absorbing piece is located on the side of the first sound-absorbing piece away from the fan blade;

[0023] And / or, the second sound-absorbing piece is located on the side of the first sound-absorbing piece close to the fan blade.

[0024] In some embodiments, the projection area of the first sound-absorbing piece in the axial direction is greater than the projection area of the fan blade in the axial direction; the projection area of the second sound-absorbing piece in the axial direction is greater than the projection area of the fan blade in the axial direction.

[0025] In some embodiments, the side of the sound-absorbing hole away from the air duct cavity has a second hole, the second hole is connected with the second sound-absorbing piece; the wind blown by the fan blade passes through the second hole.

[0026] In some embodiments, further comprising: a front cover arranged on the shell, and the second sound-absorbing piece is arranged between the front cover and the first sound-absorbing piece.

[0027] In some embodiments, further comprising:

[0028] A driving piece is arranged on the shell and is in transmission connection with the fan blade, the driving piece is used to drive the fan blade to rotate; the driving piece and the sound-absorbing assembly are arranged on the same side of the fan blade.

[0029] In some embodiments, the shell comprises:

[0030] A first shell, the fan blade and the sound-absorbing assembly are arranged on the first shell;

[0031] A second shell connected to the first shell, the second shell and the first shell enclose to form the air duct cavity, and the second shell is arranged away from the fan blade;

[0032] An air inlet communicating with the air duct cavity is arranged on the second shell;

[0033] The air duct cavity has an air outlet arranged between the first shell and the second shell.

[0034] The bladeless fan with the structure can form the air duct cavity by arranging the shell, and can provide mounting positions for the blade and the sound-absorbing assembly, and protect the components in the air duct cavity. By arranging the blade, the blade can drive the fluid in the air duct cavity to circulate. By arranging the sound-absorbing assembly, the noise inside the bladeless fan can be sound-absorbed. By relatively arranging part of the sound-absorbing assembly and the blade along the axial direction of the blade, the space utilization of the internal space of the air duct cavity can be improved.

[0035] Therefore, the bladeless fan provided by the application can solve the problem of large noise of the bladeless fan. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 A schematic view of the main structure of the bladeless fan provided by the embodiment of the application;

[0038] Figure 2 A schematic view of the mounting structure of the sound-absorbing hole and the blade provided by the embodiment of the application; Figure 1 A sectional view of A-A in the above figure;

[0039] Figure 3 A schematic view of the mounting structure of the sound-absorbing hole and the blade provided by the embodiment of the application;

[0040] Explanation of reference signs:

[0041] 100-Shell; 101-First shell; 102-Second shell;

[0042] 200-Blade;

[0043] 300-Sound-absorbing assembly; 301-First sound-absorbing piece; 3011-Sound-absorbing hole; 3012-First hole; 3013-Second hole; 302-Second sound-absorbing piece;

[0044] 400-Front cover;

[0045] 500-Driving piece;

[0046] 600-Air duct cavity; 601-Air inlet; 602-Air outlet. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0048] The bladeless fan refers to a fan without exposed rotating blades. The impeller of the bladeless fan is located inside the shell of the bladeless fan, the shell is provided with an air inlet and an air outlet, and the inside of the shell is provided with a flow channel. Through the air inlet on the shell, the air around the shell can be sucked into the inside of the shell through the impeller and transported to the air outlet on the shell through the flow channel in the inside of the shell.

[0049] In the related art, the air passing through the high-speed rotating impeller is accelerated, and after being accelerated, the air generates vortex and airflow friction in the inside of the shell, resulting in noise of the bladeless fan, and the motor in transmission connection with the impeller also generates mechanical noise in the process of operation.

[0050] In order to overcome the defects in the prior art, by setting the shell, the air duct cavity can be formed, and the mounting position of the fan blade and the sound absorbing assembly can be provided, and the components in the air duct cavity can be protected. By setting the fan blade, the fan blade can drive the fluid in the air duct cavity to circulate. By setting the sound absorbing assembly, the noise in the inside of the bladeless fan can be sound-absorbed, and by relatively arranging part of the sound absorbing assembly and the fan blade along the axial direction of the fan blade, the space utilization of the inside space of the air duct cavity can be improved.

[0051] Therefore, the bladeless fan provided by the present application can solve the problem of large noise of the bladeless fan.

[0052] The content of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can more clearly and specifically understand the content of the present application.

[0053] As shown in Figures 1 to 2 The present application provides a bladeless fan, which comprises a shell 100, a fan blade 200 and a sound absorbing assembly 300. The shell 100 has an air duct cavity 600, the fan blade 200 is rotatably arranged in the air duct cavity 600, the sound absorbing assembly 300 is located in the air duct cavity 600, and part of the sound absorbing assembly 300 is arranged opposite to the fan blade 200 along the axial direction of the fan blade 200.

[0054] The specific structure of the bladeless fan and various possible embodiments will be described in detail below.

[0055] It should be noted that the bladeless fan provided by the embodiments of the present application can be a handheld bladeless fan, or a vertical bladeless fan, or a table type bladeless fan. Here, no limitation is made, and the actual use requirements can be selected.

[0056] It should be noted that the shell 100 also has an air inlet 601 in communication with the air duct cavity 600.

[0057] It can be understood that the fluid outside the shell 100 can enter the inside of the air duct cavity 600 through the air inlet 601.

[0058] It should be noted that the sound absorbing assembly 300 has a plurality of different installation positions, which will be described in turn below.

[0059] In one possible embodiment, the sound absorbing assembly 300 is located on the side of the fan blade 200 close to the air inlet 601.

[0060] It can be understood that the sound absorbing assembly 300 located on the side of the fan blade 200 close to the air inlet 601 can enable the sound absorbing assembly 300 to absorb the noise in the air duct cavity 600.

[0061] In another possible embodiment, the sound absorbing assembly 300 is located on the side of the fan blade 200 away from the air inlet 601.

[0062] It can be understood that the sound absorbing assembly 300 located on the side of the fan blade 200 away from the air inlet 601 can enable the sound absorbing assembly 300 to absorb the noise in the air duct cavity 600, and the sound absorbing assembly 300 can also absorb the mechanical noise of the driving member 500 in transmission connection with the fan blade 200.

[0063] In addition, in another possible embodiment, the sound absorbing assembly 300 is provided with two groups, one group of the sound absorbing assembly 300 is located on the side of the fan blade 200 close to the air inlet 601, and the other group of the sound absorbing assembly 300 is located on the side of the fan blade 200 away from the air inlet 601.

[0064] It can be understood that the sound absorbing assembly 300 can enable the sound absorbing assembly 300 to absorb the noise in the air duct cavity 600, and can also absorb the mechanical noise of the driving member 500 in transmission connection with the fan blade 200. In addition, increasing the number of sound absorbing assemblies 300 can further reduce the internal noise of the bladeless fan.

[0065] It can be understood that the installation position of the sound attenuation assembly 300 is not limited, and can be selected according to actual use requirements.

[0066] The sound attenuation assembly 300 provided by the embodiment of the application comprises a first sound attenuation piece 301, which is arranged on the inner wall of the shell 100, and a plurality of sound attenuation holes 3011 are arranged on the first sound attenuation piece 301, and the first hole opening 3012 of the sound attenuation hole 3011 faces the air duct cavity 600.

[0067] It can be understood that by arranging the sound attenuation hole 3011 and making the first hole opening 3012 of the sound attenuation hole 3011 face the air duct cavity 600, the air duct cavity 600 and the hole cavity of the sound attenuation hole 3011 can be communicated through the first hole opening 3012, and the sound waves of the noise can be reflected or interfered in the hole cavity of the sound attenuation hole 3011 when the fluid in the air duct cavity 600 flows through the sound attenuation hole 3011, so that part of the sound energy is attenuated, thereby reducing the internal noise of the air duct cavity 600.

[0068] It should be noted that the first sound attenuation piece 301 has a plurality of different connection modes, and the connection modes of the first sound attenuation piece 301 will be described in turn.

[0069] In a possible implementation, the first sound attenuation piece 301 is integrally formed with the inner wall of the shell 100.

[0070] It can be understood that by integrally forming the first sound attenuation piece 301 with the inner wall of the shell 100, the space occupation of the shell 100 can be reduced, so as to improve the utilization rate of the internal space of the air duct cavity 600.

[0071] In another possible implementation, the first sound attenuation piece 301 is fixedly connected with the inner wall of the shell 100.

[0072] It can be understood that by fixedly connecting the first sound attenuation piece 301 with the inner wall of the shell 100, the connection position between the first sound attenuation piece 301 and the shell 100 can be more flexible.

[0073] It can be understood that the connection mode of the first sound attenuation piece 301 is not limited, and can be selected according to actual use requirements.

[0074] It should be noted that the sound attenuation hole 3011 is arranged in a plurality of sound attenuation holes 3011.

[0075] It can be understood that increasing the number of sound attenuation holes 3011 can further reduce the internal noise of the air duct cavity 600.

[0076] Further, the plurality of sound attenuation holes 3011 are arranged in an array on the first sound attenuation piece 301.

[0077] It can be understood that the plurality of sound holes 3011 are arranged in an array on the first sound-absorbing member 301, which can improve the surface utilization rate of the first sound-absorbing member 301 and make the distribution of the sound holes 3011 more uniform, thereby improving the aesthetics of the first sound-absorbing member 301.

[0078] The bladeless fan provided by the embodiment of the present application further comprises a second sound-absorbing member 302, which is configured as a sound-absorbing material.

[0079] It can be understood that when the sound waves enter the internal gap of the sound-absorbing material, the sound waves of the noise are reflected back and forth in the pores, and the sound energy can be gradually converted into heat energy by using the friction and viscous effects, thereby playing a role in reducing the noise in the air duct cavity 600.

[0080] It should be noted that the sound-absorbing material can be one or a combination of foam, mineral wool, glass wool, polyester fiber board, wool and cotton fiber, acoustic panel, soundproof felt or other sound-absorbing materials, which is not limited herein and can be selected according to actual use requirements.

[0081] It should be noted that the foam can be one or a combination of polyurethane foam and polyester fiber foam, which is not limited herein and can be selected according to actual use requirements.

[0082] It should be noted that the second sound-absorbing member 302 has a plurality of different installation positions, which will be described in turn below.

[0083] In one possible implementation, the second sound-absorbing member 302 is arranged in the sound hole 3011.

[0084] It can be understood that the second sound-absorbing member 302 is arranged in the sound hole 3011, which can improve the utilization rate of the hole cavity in the sound hole 3011, thereby reducing the space occupation of the second sound-absorbing member 302 to reduce the volume and space occupation of the bladeless fan.

[0085] In another possible implementation, the second sound-absorbing member 302 is located on the side of the first sound-absorbing member 301 away from the fan blade 200.

[0086] It can be understood that the second sound-absorbing member 302 is located on the side of the first sound-absorbing member 301 away from the fan blade 200, which can make the second sound-absorbing member 302 have a larger installation space and a larger extension size, thereby improving the sound-absorbing effect on the noise in the air duct cavity 600 to reduce the internal noise of the air duct cavity 600.

[0087] In addition, in another possible implementation, the second sound-absorbing member 302 is located on the side of the first sound-absorbing member 301 close to the fan blade 200.

[0088] It can be understood that the second sound-absorbing part 302 is located on the side of the first sound-absorbing part 301 close to the fan blade 200, so that the second sound-absorbing part 302 has a larger contact area with the air duct cavity 600, thereby improving the sound-absorbing effect on the noise in the air duct cavity 600, so as to reduce the internal noise of the air duct cavity 600.

[0089] In addition, in other possible embodiments, the installation position of the second sound-absorbing part 302 can be a combination of the above three embodiments, specifically, any combination of two or a combination of three, which is not limited here and can be selected according to actual use requirements.

[0090] It can be understood that the installation position of the second sound-absorbing part 302 is not limited and can be selected according to actual use requirements.

[0091] As shown in Figure 3 In the bladeless fan provided by the embodiments of the present application, the projection area of the first sound-absorbing part 301 in the axial direction is greater than the projection area of the fan blade 200 in the axial direction; and the projection area of the second sound-absorbing part 302 in the axial direction is greater than the projection area of the fan blade 200 in the axial direction.

[0092] It can be understood that the projection area of the first sound-absorbing part 301 in the axial direction is greater than the projection area of the fan blade 200 in the axial direction, so that the coverage area of the first sound-absorbing part 301 is larger, thereby improving the noise reduction effect of the air duct cavity 600. The projection area of the second sound-absorbing part 302 in the axial direction is greater than the projection area of the fan blade 200 in the axial direction, so that the coverage area of the second sound-absorbing part 302 is larger, thereby improving the noise reduction effect of the air duct cavity 600.

[0093] Further, the sound-absorbing hole 3011 has a plurality of different setting types, which will be described in turn.

[0094] In one possible embodiment, the sound-absorbing hole 3011 is a through hole.

[0095] It should be noted that the side of the sound-absorbing hole 3011 away from the air duct cavity 600 has a second hole 3013, and the second hole 3013 is connected with the second sound-absorbing part 302; the wind blown by the fan blade 200 passes through the second hole 3013.

[0096] It should be noted that the wind in the air duct cavity 600 can enter the hole inner cavity of the sound-absorbing hole 3011 after passing through the first hole 3012, flow through the hole inner cavity of the sound-absorbing hole 3011 to the second hole 3013, and then reach the second sound-absorbing part 302.

[0097] It can be understood that the second hole 3013 is connected with the second sound attenuation member 302, so that the air in the air duct cavity 600 can pass through the sound attenuation hole 3011 to reach the second sound attenuation member 302, so that the second sound attenuation member 302 can reduce the noise of the air duct cavity 600.

[0098] In another possible implementation, the sound attenuation hole 3011 is a blind hole.

[0099] It should be noted that the second sound attenuation member 302 is arranged in the hole of the blind hole.

[0100] It can be understood that the arrangement of the blind hole can improve the space utilization of the hole cavity of the blind hole, and can reduce the space occupation of the sound attenuation hole 3011 and the second sound attenuation member 302.

[0101] It can be understood that the type of the sound attenuation hole 3011 is not limited, and can be selected according to actual use requirements.

[0102] The bladeless fan provided by the embodiment of the application further includes a front cover 400, the front cover 400 is arranged on the shell 100, and the second sound attenuation member 302 is arranged between the front cover 400 and the first sound attenuation member 301.

[0103] It can be understood that by arranging the front cover 400, the front cover 400 and the first sound attenuation member 301 can be used to install the second sound attenuation member 302.

[0104] It should be noted that the installation position of the second sound attenuation member 302 has multiple types, and the installation position of the second sound attenuation member 302 will be described in turn.

[0105] In one possible implementation, the second sound attenuation member 302 is installed on the front cover 400.

[0106] It can be understood that by installing the second sound attenuation member 302 on the front cover 400, and then installing the front cover 400 on the shell 100, the installation between the front cover 400, the second sound attenuation member 302 and the shell 100 can be completed.

[0107] In another possible implementation, the second sound attenuation member 302 is installed on the first sound attenuation member 301.

[0108] It should be noted that the second sound attenuation member 302 is located at one end of the first sound attenuation member 301 away from the fan blade 200.

[0109] It can be understood that by installing the second sound attenuation member 302 on the first sound attenuation member 301, and then installing the front cover 400 on the shell 100, the front cover 400 can protect the second sound attenuation member 302, and can prevent the second sound attenuation member 302 from falling off, so that the installation between the front cover 400, the second sound attenuation member 302 and the shell 100 can be completed.

[0110] In addition, in another possible implementation, one end of the second sound-damping member 302 is connected with the first sound-damping member 301, and the other end of the second sound-damping member 302 is connected with the front cover 400.

[0111] It can be understood that by connecting one end of the second sound-damping member 302 with the first sound-damping member 301 and connecting the other end of the second sound-damping member 302 with the front cover 400, the connection strength between the second sound-damping member 302 and the first sound-damping member 301 and the front cover 400 can be improved, so as to prolong the service life of the second sound-damping member 302.

[0112] It can be understood that the installation position of the second sound-damping member 302 is not limited and can be selected according to actual use requirements.

[0113] It should be noted that there are various installation modes between the front cover 400 and the shell 100, and the installation modes between the front cover 400 and the shell 100 will be exemplarily described below.

[0114] In one possible implementation, the front cover 400 and the shell 100 are installed through buckles, the buckles are arranged on the shell 100, and the buckles are used to be connected with the second sound-damping member 302.

[0115] It can be understood that the buckles are used to install the second sound-damping member 302 on the shell 100, and the second sound-damping member 302 can be conveniently disassembled.

[0116] In another possible implementation, the front cover 400 and the shell 100 are installed through an adhesive tape, and the adhesive tape is bonded between the shell 100 and the second sound-damping member 302.

[0117] It can be understood that the adhesive tape is used to bond the second sound-damping member 302 to the shell 100, and the installation position between the second sound-damping member 302 and the shell 100 can be conveniently adjusted.

[0118] It can be understood that the setting type of the anti-disengagement member is not limited and can be selected according to actual use requirements.

[0119] The bladeless fan provided by the embodiment of the present application further includes a driving member 500, the driving member 500 is arranged on the shell 100 and is in transmission connection with the fan blade 200, the driving member 500 is used to drive the fan blade 200 to rotate, and the driving member 500 and the sound-damping assembly 300 are arranged on the same side of the fan blade 200.

[0120] It can be understood that the driving member 500 is used to drive the fan blade 200 to rotate, so that the fluid passing through the fan blade 200 can be accelerated, thereby improving the flow rate of the fluid in the air duct cavity 600. The driving member 500 and the sound attenuation assembly 300 are arranged on the same side of the fan blade 200, so that the sound attenuation assembly 300 can attenuate the mechanical noise generated by the driving member 500 during operation.

[0121] The shell 100 provided by the embodiment of the present application comprises a first shell 101 and a second shell 102. The fan blade 200 and the sound attenuation assembly 300 are arranged in the first shell 101, the second shell 102 is connected to the first shell 101, the second shell 102 and the first shell 101 enclose the air duct cavity 600, and the second shell 102 is arranged in a spaced manner with the fan blade 200.

[0122] It can be understood that the shell 100 adopts a split structure, so that the fan blade 200 and the sound attenuation assembly 300 can be conveniently installed in the first shell 101, and then the second shell 102 and the first shell 101 are connected.

[0123] It should be noted that the air inlet 601 is arranged on the second shell 102, the air duct cavity 600 has an air outlet 602, and the air outlet 602 is arranged between the first shell 101 and the second shell 102.

[0124] It should be noted that the air inlet 601, the air duct cavity 600 and the air outlet 602 are sequentially communicated.

[0125] It can be understood that the fluid outside the shell 100 can enter the air duct cavity 600 through the air inlet 601, and then flow through the air duct cavity 600 and be guided out to the outside of the shell 100 through the air outlet 602.

[0126] It can be understood that, along the flow direction of the fluid, the fan blade 200 is located in the air duct cavity 600, and can be used to accelerate the flow rate of the fluid in the air duct cavity 600.

[0127] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like mean that the described embodiment can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or property is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or property in combination with other embodiments described explicitly or implicitly.

[0128] In general, terminology can be understood at least in part from usage in context. For example, and as used herein, the term "one or more" can describe any feature, structure, or characteristic in the singular or can describe combinations of features, structures, or characteristics, in the plural, depending on the context in which such terms are used. Similarly, terms, such as "a," "an," or "the," again, can be understood to convey a singular usage or to convey a plural usage, depending on the context in which such terms are used.

[0129] It will be readily understood that the terms "on," "above," and "over," as used herein, shall not convey the sole meaning of "directly on," but shall also include the meaning of "on," "above," or "over," with intervening features or layers, and that "above" or "over" shall also include the meaning of "above" or "over," without intervening features or layers (i.e., directly on).

[0130] In addition, spatially relative terms, such as "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0131] Finally, it should be noted that the above-described embodiments are merely exemplary of the application, and should not be used in a manner to limit the scope of the application. Those skilled in the art will be able to make modifications and / or substitutions for elements disclosed without departing from the scope of the application.

Claims

1. A bladeless fan, characterized by, The application relates to a fan, which comprises the following components: a housing (100) having a wind channel cavity (600); a fan blade (200) rotatably arranged in the wind channel cavity (600); a sound attenuation assembly (300) arranged in the wind channel cavity (600), and part of the sound attenuation assembly (300) is arranged opposite to the fan blade (200) along the axial direction of the fan blade (200).

2. The bladeless fan of claim 1, wherein, The housing (100) further has an air inlet (601) communicating with the wind channel cavity (600); the sound attenuation assembly (300) is arranged on the side of the fan blade (200) close to the air inlet (601); and / or the sound attenuation assembly (300) is arranged on the side of the fan blade (200) away from the air inlet (601).

3. The bladeless fan of claim 1, wherein, The sound attenuation assembly (300) comprises: a first sound attenuation piece (301) arranged on the inner wall of the housing (100), and a plurality of sound attenuation holes (3011) are arranged on the first sound attenuation piece (301) in a spaced manner, and the first hole (3012) of the sound attenuation hole (3011) faces the wind channel cavity (600).

4. The bladeless fan of claim 3, wherein, The sound attenuation assembly (300) further comprises a second sound attenuation piece (302) configured as a sound absorption material.

5. The bladeless fan of claim 4, wherein, The second sound attenuation piece (302) is arranged in the sound attenuation hole (3011); and / or the second sound attenuation piece (302) is arranged on the side of the first sound attenuation piece (301) away from the fan blade (200); and / or the second sound attenuation piece (302) is arranged on the side of the first sound attenuation piece (301) close to the fan blade (200).

6. The bladeless fan of any of claims 4-5, wherein, The projection area of the first sound attenuation piece (301) in the axial direction is greater than the projection area of the fan blade (200) in the axial direction; and the projection area of the second sound attenuation piece (302) in the axial direction is greater than the projection area of the fan blade (200) in the axial direction.

7. The bladeless fan of claim 4, wherein, The side of the sound attenuation hole (3011) away from the wind channel cavity (600) has a second hole (3013) connected with the second sound attenuation piece (302); and the wind blown by the fan blade (200) passes through the second hole (3013).

8. The bladeless fan of claim 4, wherein, Further comprising: a front cover (400) arranged on the housing (100), and the second sound attenuation piece (302) is arranged between the front cover (400) and the first sound attenuation piece (301).

9. The bladeless fan of any one of claims 1-5, wherein, Further comprising: a driving piece (500) arranged on the housing (100) and in transmission connection with the fan blade (200), and the driving piece (500) is used for driving the fan blade (200) to rotate; the driving piece (500) and the sound attenuation assembly (300) are arranged on the same side of the fan blade (200).

10. The bladeless fan of any one of claims 1-5, wherein, The housing (100) comprises: a first housing (101), and the fan blade (200) and the sound attenuation assembly (300) are arranged on the first housing (101). A second shell (102) is connected to the first shell (101), the second shell (102) and the first shell (101) enclose the air duct cavity (600), and the second shell (102) is spaced apart from the fan blade (200); An air inlet (601) in communication with the air duct cavity (600) is arranged on the second shell (102); The air duct cavity (600) has an air outlet (602), and the air outlet (602) is arranged between the first shell (101) and the second shell (102).

Images